CD74HC259E

Product Overview

• Category: Integrated Circuit
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, CMOS Logic, 8-Bit Addressable Latch/Shift Register
• Package: DIP (Dual In-line Package)
• Essence: The CD74HC259E is a versatile integrated circuit that combines the functionality of an 8-bit addressable latch and a shift register. It is designed to provide high-speed data selection and manipulation capabilities in various digital applications.
• Packaging/Quantity: The CD74HC259E is typically available in a DIP package, which consists of a rectangular plastic body with two parallel rows of pins extending from its bottom. It is commonly sold in quantities of one or more.

Specifications

The CD74HC259E has the following specifications:

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Bits: 8
• Latch Enable Input: Yes
• Clock Input: Yes
• Serial Data Input: Yes
• Parallel Data Output: Yes
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The CD74HC259E has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. GND (Ground)
2. A0 (Address Bit 0)
3. A1 (Address Bit 1)
4. A2 (Address Bit 2)
5. A3 (Address Bit 3)
6. A4 (Address Bit 4)
7. A5 (Address Bit 5)
8. A6 (Address Bit 6)
9. A7 (Address Bit 7)
10. OE (Output Enable)
11. SER (Serial Data Input)
12. CLK (Clock Input)
13. Q0 (Parallel Output Bit 0)
14. Q1 (Parallel Output Bit 1)
15. Q2 (Parallel Output Bit 2)
16. VCC (Supply Voltage)

Functional Features

The CD74HC259E offers the following functional features:

• Addressable Latch: The device can store data at a specific address location, allowing individual bits to be selectively latched or unlatched.
• Shift Register: It can shift data through its internal registers, enabling serial-to-parallel or parallel-to-serial data conversion.
• Output Enable Control: The OE pin allows the user to enable or disable the parallel outputs, providing flexibility in data manipulation.
• High-Speed Operation: The HC logic family ensures fast switching times and efficient data processing.

Advantages and Disadvantages

Advantages of using the CD74HC259E include:

• Versatile functionality combining latch and shift register capabilities
• High-speed operation suitable for time-critical applications
• Wide operating voltage range for compatibility with various systems
• Compact DIP package for easy integration into circuit designs

Disadvantages of the CD74HC259E include:

• Limited number of addressable bits (8 bits)
• Relatively higher power consumption compared to some low-power alternatives
• Sensitivity to electrostatic discharge (ESD) due to CMOS technology

Working Principles

The CD74HC259E operates based on the principles of addressable latches and shift registers. When the latch enable input (LE) is activated, the data present at the serial data input (SER) is stored in the selected address location determined by the address inputs (A0-A7). The stored data can then be accessed from the parallel output pins (Q0-Q2) when the output enable (OE) is enabled.

Additionally, the CD74HC259E can perform serial-to-parallel or parallel-to-serial data conversion by shifting the stored data through its internal registers. This is achieved by providing clock pulses at the clock input (CLK) while keeping the latch enable input (LE) inactive.

Detailed Application Field Plans

The CD74HC259E finds applications in various digital systems and circuits, including:

1. Address Decoding: The device can be used to decode address signals in microprocessor-based systems, enabling efficient memory or peripheral selection.
2. Data Multiplexing: It allows multiple data sources to be selectively routed to a common output, facilitating efficient data switching and routing.
3. LED Display Control: The CD74HC259E can control the display of LEDs in applications such as numeric displays or scrolling message boards.
4. Serial Data Conversion: It enables the conversion of serial data streams to parallel format or vice versa, useful in communication protocols and data transmission systems.
5. Logic Function Implementation: The device can be utilized to implement various logic functions, such as counters, shifters, or state machines.

Detailed and Complete Alternative Models

Some alternative models that